Available Answers

1. 1.

   Fill in the blanks.

   1. RBCs are red in colour because of the presence of a red-coloured iron protein called _____________________.
   2. Capillaries are the fine blood vessels connecting ____________________ with veins.
   3. The heart is enclosed in a double-layered sac called ______________________.
   4. _______________________ are the upper chambers of the heart.
   5. ________________________ valve is present at the base of the pulmonary artery.
   6. Blood group _____________ is called the universal recipient.
   7. _________________ have valves which prevent back flow of blood.
   8. The _________________ cavae are large veins which carry deoxygenated blood from the body away from the heart.
   9. There is a _______________ valve between the right auricle and the right ventricle.
   10. ____________________________ carries deoxygenated blood from anterior parts of the body to the right auricle.
   11. The largest artery in the body is _________________________________.
   12. _________________________ is a device used to hear the heartbeat.
   13. The right side of the heart has ______________________ blood.
   14. _______________________ make a person feel as if his heart is beating too fast, skipping a beat, or fluttering.
2. 2.

   State if the following statements are true or false. Correct the statement if it is false.

   1. Veins are fine blood vessels which carry blood away from the heart.
   2. The red colour of the blood is due to the pigment haemocyanin.
   3. Pericardium is a double-layered sac which encloses the heart.
   4. The largest artery in the body is the pulmonary artery.
   5. Oxygenated blood from lungs is brought to the left auricle through aorta.
   6. Each heartbeat is heard as two sounds.
   7. Circulation of blood between the heart and body organ (except lungs) is called blood circulation.
   8. The normal value of blood pressure in an adult is considered at 120/80 mm Hg.
   9. Blood group AB has neither antigen A nor antigen B.
   10. Hypertension increases the risk of heart diseases and kidney diseases.
3. 3.

   Circle the odd one out. Give reasons for your choice.

   1. artery, vein, ligament, capillary
   2. neutrophil, basophil, RBC, eosinophil
   3. right auricle, left auricle, left ventricle, aorta
   4. antigen Am antigen B, Rh-factor, haemoglobin
   5. superior vena cava, inferior vena cava, pulmonary vein, aorta
4. 4.

   Differentiate between Auricles and Ventricles.

5. 5.

   Differentiate between Cardiac Arrest and Hypertension.

6. 6.

   Differentiate between Universal Recipient and Universal Donor.